Lawyer, business executive, and boxing promoter. Correspondence, memoranda, newspaper clippings, printed matter, photographs, and other papers reflecting the social life of the Gibson family in Chicago, Illinois. Also included in the papers is Gibson's correspondence with his wife, Isabelle Carson Gibson, written while he served as an adviser on African-American affairs to the United States War Department in Washington, D.C., during World War II.

Sportswriter, baseball executive, and author. Correspondence, drafts of books and articles, notes, memoranda, newspaper clippings, and printed matter relating primarily to Mann's biography of Branch Rickey and to Rickey's contributions to professional baseball.

Author. Correspondence, literary manuscripts, articles, addresses, radio scripts, clippings, scrapbooks, and other papers consisting primarily of manuscripts for Terhune's short stories and articles relating chiefly to dogs.